*{
    padding: 0;
    margin: 0;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}
body{
    background: #f5f8fa;
}
.container{
    width: 1200px;
    margin: auto;
}
ul li{
    list-style: none;
}
a{
    text-decoration: none;
}

/*header样式开始*/
header{
    background: #3097d1;
    border-bottom: 1px solid #1c73a5;
    margin-bottom: 29px;
}
nav .div{
   background: url("../img/brand-white.png")no-repeat;
    width: 85px;
    height: 23px;
    background-size: 100%;
    position: absolute;
    top: 14px;
}
nav{
    display: flex;
    flex-wrap: wrap;
}
nav ul{
    display: flex;
    flex-wrap: wrap;
    padding-left: 115px;
    padding-top: 20px;
    padding-bottom: 20px;
}
.li1 a{
    display: block;
    font: 15px/10px Arial;
    color: #f2e5e5;
    margin-right: 31px;
}
.li1 a:hover{
    text-decoration: underline;
}
/*header样式结束*/



/*main样式开始*/
.main{
    display: flex;
    flex-wrap: wrap;
    flex-direction: row;
}

/*main-left样式开始*/
.main-left{
    flex-basis: 25%;
}
/*introduce样式*/
.introduce{
    text-align: center;
    border: 1px solid #d3e0e9;
    border-radius: 3px;
    position: relative;
    margin-bottom: 30px;
    background: #ffffff;
}
.introduce div{
    padding-left: 29px;
    padding-right: 29px;
}
.img1{
    width: 100%;
    height: 150px;
    border-bottom: 1px solid #d3e0e9;
    display: block;
    border-radius: 3px 3px 0 0;
}
.img2{
    width: 100px;
    height: 100px;
    border-radius: 100%;
    position: absolute;
    top: 96px;
    left: 34%;
    display: block;
}
.p{
    padding-top: 53px;
}
.p h4{
    padding-bottom: 10px;
}
.p p{
    font: 15px Arial;
    color: #413f48;
    padding-bottom: 23px;
}
/*introduce结束*/

/*about样式*/
.about{
    padding: 12px 75px 11px 14px;
    border: 1px solid #d3e0e9;
    border-radius: 3px;
    margin-bottom: 22px;
    background: #ffffff;
}
.about h5{
    font: 15px Arial;
    font-weight: bold;
    padding-bottom: 15px;
}
.about p{
    font: 15px Arial;
    padding-bottom: 10px;
}
.about span{
    color: #3697d1;
}
/*about样式结束*/

/*photos样式开始*/
.photos{
    padding: 17px 16px 9px 15px;
    border: 1px solid #d3e0e9;
    border-radius: 3px;
    background: #ffffff;
}
.photos h5{
    font: 15px Arial;
    font-weight: bold;
    margin-bottom: 14px;
}
.img3{
    display: flex;
    flex-wrap: wrap;
}
.img4{
    margin-right: 33px;
}
.photos img{
    width: 117px;
    height: 118px;
    font-weight: bold;
    display: block;
}
.photos img{
    display: flex;
    margin-bottom: 33px;
}
/*photos样式结束*/
/*main-left样式结束*/


/*main-middle样式开始*/
.main-middle{
    flex-basis: 50%;
}
.main-middle-1{
    margin-left: 30px;
}

/*dave样式开始*/
.dave{
    padding: 27px 20px 42px 20px;
    border: 1px solid #d3e0e9;
    border-radius: 3px 3px 0 0;
    font: 15px Arial;
    background: #ffffff;
}
.dave-1{
    display: flex;
    flex-wrap: wrap;
}
.dave-1 h4{
    /*padding-right: 365px;*/
    font: 15px Arial;
    font-weight: bold;
}
.dave-1 time{
    padding-left: 74%;
    /*display: inline-table;*/
    font: 13px Arial;
    color: #a3abb2;
}
.dave .p1{
    padding-top: 14px;
    padding-bottom: 26px;
    color: #4f5753;
}
.img5{
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 30px;
}
.img5 img{
    width: 244px;
    height: 213px;
    display: block;
    margin-bottom: 40px;
}
.img6{
    margin-right: 40px;
}
.p2{
    padding-bottom: 23px;
    color: #4f5753;
}
.p2 span,.p3 span,.p6 span{
    font: 15px Arial;
    color: #1e3948;
    font-weight: bold;
}
.p3{
    color: #4f5753;
    padding-bottom: 27px;
}
/*dave样式结束*/


/*jacob样式开始*/
.jacob{
    padding: 33px 20px 37px 18px;
    border: 1px solid #d3e0e9;
    border-top: none;
    font: 15px Arial;
    background: #ffffff;
}
.jacob-1{
    display: flex;
    flex-wrap: wrap;
}
.jacob-1 h4{
    /*padding-right: 353px;*/
    font: 15px Arial;
    font-weight: bold;
}
.jacob-1 time{
    padding-left: 72%;
    font: 13px Arial;
    color: #a3abb2;
}
.p4{
    padding-top: 10px;
    color: #4f5753;
}
/*jacob样式结束*/


/*mark样式开始*/
.mark{
    padding: 27px 21px 26px 20px;
    border: 1px solid #d3e0e9;
    border-top: none;
    font: 15px Arial;
    background: #ffffff;
    margin-bottom: 100px;
}
.mark-1{
    display: flex;
    flex-wrap: wrap;
}
.mark-1 h4{
    font: 15px Arial;
    font-weight: bold;
}
.mark-1 time{
    padding-left: 80%;
    font: 13px Arial;
    color: #a3abb2;
}
.p5{
    color: #4f5753;
    padding-top: 14px;
    padding-bottom: 26px;
}
.img7{
    width: 100%;
    padding-bottom: 40px;
}
.p6{
    color: #4f5753;
}
/*mark样式结束*/

/*main-middle样式结束*/


/*main-right样式开始*/
.main-right{
    flex-basis: 25%;
}
.main-right-1{
    margin-left: 30px;
}
/*.main-1样式开始*/
.main-1{
    background: #ffffff;
    padding: 18px 16px 15px 15px;
    border: 1px solid #d3e0e9;
    border-radius: 3px;
    font: 14px Arial;
    margin-bottom: 30px;
}
.main-1 h4{
    font-weight: bold;
}
.h4-1{
    padding-bottom: 10px;
}
.main-1 img{
    width: 100%;
    height: 230px;
    padding-bottom: 15px;
}
.main-1 a{
    display: inline-block;
    padding: 9px;
    border: 1px solid #2a88bd;
    border-radius: 3px;
    margin-top: 17px;
    color: #518fc1;
}
.main-1 a:hover{
    color: #d3e0e9;
    border: 1px solid #d3e0e9;
}

/*main-1样式结束*/

/*main-2样式开始*/
.main-2{
    font: 14px Arial;
    border: 1px solid #d3e0e9;
    border-radius: 3px 3px 0 0;
    padding: 17px 0 26px 15px;
    background: #ffffff;
}
.main-2 h4{
    font-weight: bold;
    margin-bottom: 14px;
}
.main-2-1,.main-2-2{
    display: flex;
    flex-wrap: wrap;
}
.img8{
    width: 60px;
    height: 60px;
    border-radius: 100%;
    margin-right: 14px;
}
.data1,.data2{
    align-self: center;
}
.img9{
    display: inline-block;
    padding-right: 3px;
}
.data1 a,.data2 a{
    display: inline-block;
    padding: 8px 10px;
    border: 1px solid #2a88bd;
    border-radius: 3px;
    margin-top: 8px;
    font: 14px Arial;
    color: #2a88bd;
}
.data1 a:hover,.data2 a:hover{
    color: #d3e0e9;
}
.main-2-2{
    margin-top: 20px;
}
.data1 p,.data2 p{
    color: #415e75;
}
.data1 span,.data2 span{
    color: #1e3948;
}
/*main-2样式结束*/

/*main-3样式开始*/
.main-3{
    background: #f5f8fa;
    padding: 16px 24px 13px 16px;
    border: 1px solid #d3e0e9;
    border-radius: 0 0 3px 3px;
    border-top: none;
}
.main-3 p{
    font: 14px Arial;
}
/*main-3样式结束*/
/*main-right样式结束*/

/*main样式结束*/


/*footer样式开始*/
    footer{
        text-align: center;
        padding-top: 56px;
        padding-bottom: 60px;
        font: 14px Arial;
        border-top: 1px solid #cccccc;
    }
    footer ul{
        display: flex;
        flex-direction: row;
        justify-content: center;
        padding-top: 20px;
    }
    footer .li2{
        padding-right: 24px;
    }
    footer a{
        color: #3097d1;
    }
    footer a:hover{
        text-decoration: underline;
    }

/*footer样式结束*/



/*响应式样式*/

@media (max-width: 600px) {
    header{
        width: 100%;
    }
    .header{
        width: 90%;
        margin: auto;
    }
    .header ul{
        padding-left: 33%;
    }
    .header .a1{
        margin-right: 10px;
        font-size: 12px;
    }
    .header .a2{
        margin-right: 0;
    }
    .main{
        width: 100%;
        display: flex;
        justify-content: center;
    }
    .main-left{
        flex-basis: 90%;
    }
    .main-middle{
        flex-basis: 90%;
    }
    .mark{
        margin-bottom: 0;
    }
    .main-middle-1{
        margin-left: 0;
        margin-top: 20px;
        margin-bottom: 20px;
    }
    .dave-1 h4,.jacob-1 h4,.mark-1 h4{
        padding-right: 0;
    }
    .dave-1 time,.jacob-1 time,.mark-1 time{
        position: fixed;
    }
    .main-right{
        flex-basis: 90%;
    }
    .main-right-1{
        margin-left: 0;
    }
    footer{
        width: 100%;
        margin-top: 30px;
    }
    .footer{
        width: 90%;
        margin: auto;
    }
    .img3 img,.img5 img{
        width: 100%;
    }
    .footer li{
        font-size: 12px;
    }
    .img4,.img6{
        margin-right: 0;
    }
}